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[sles <1424181@xxxxxxxxxxxxxxxxxx>]

OK, problem here is it usb_modeswitch.
Right after boot it fails for some reason, and huawei 3372h is still visible as
Bus 003 Device 003: ID 12d1:1f01 Huawei Technologies Co., Ltd.

But if I unplug it and plug again, then it looks like
 Bus 003 Device 005: ID 12d1:14dc Huawei Technologies Co., Ltd. 
and recognized by cdc_ether

usb_modemswitch.log is attached.

Right now I added
usb_modeswitch -v 0x12d1 -p 0x1f01 -M "55534243123456780000000000000a11062000000000000100000000000000"
to correct modem init.
It worked ones, will test more....

This is, definetely, ubuntu bug...


** Attachment added: "usb_modeswitch.log"
   https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1424181/+attachment/4490354/+files/usb_modeswitch.log

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https://bugs.launchpad.net/bugs/1424181

Title:
  Huawei E3372 USB modem not always detected

Status in linux package in Ubuntu:
  Incomplete

Bug description:
  What happened:
  I have to unplug and plug my Huawei E3372 USB modem in order to  connect to the Internet. Otherwise the Internet connection is not established. The problem is present in kernel versions 3.13.0-45 and 3.19.0-031900. However, xubuntu 12.04 works fine.

  Expected to happen:
  The computer should establish the Internet connection automatically.

  Steps to reproduce the bug:
  Plug the USB modem into the computer and switch the computer on.

  I use Ubuntu 14.04.2 LTS.

  ProblemType: Bug
  DistroRelease: Ubuntu 14.04
  Package: linux-image-3.13.0-45-generic 3.13.0-45.74
  ProcVersionSignature: Ubuntu 3.13.0-45.74-generic 3.13.11-ckt13
  Uname: Linux 3.13.0-45-generic x86_64
  NonfreeKernelModules: wl
  ApportVersion: 2.14.1-0ubuntu3.7
  Architecture: amd64
  AudioDevicesInUse:
   USER        PID ACCESS COMMAND
   /dev/snd/controlC0:  tohoyn     2041 F.... pulseaudio
   /dev/snd/controlC1:  tohoyn     2041 F.... pulseaudio
  CurrentDesktop: Unity
  Date: Sat Feb 21 14:48:27 2015
  HibernationDevice: RESUME=UUID=a5d87b0f-a635-499b-9343-7315a2a0e6c9
  InstallationDate: Installed on 2014-05-28 (269 days ago)
  InstallationMedia: Ubuntu 14.04 LTS "Trusty Tahr" - Release amd64 (20140417)
  MachineType: LENOVO 20238
  ProcFB: 0 inteldrmfb
  ProcKernelCmdLine: BOOT_IMAGE=/vmlinuz-3.13.0-45-generic root=/dev/mapper/ubuntu--vg-root ro quiet splash vt.handoff=7
  RelatedPackageVersions:
   linux-restricted-modules-3.13.0-45-generic N/A
   linux-backports-modules-3.13.0-45-generic  N/A
   linux-firmware                             1.127.11
  SourcePackage: linux
  StagingDrivers: rts5139
  UpgradeStatus: No upgrade log present (probably fresh install)
  dmi.bios.date: 12/07/2013
  dmi.bios.vendor: LENOVO
  dmi.bios.version: 79CN44WW(V3.03)
  dmi.board.asset.tag: No Asset Tag
  dmi.board.name: INVALID
  dmi.board.vendor: LENOVO
  dmi.board.version: 31900058Std
  dmi.chassis.asset.tag: No Asset Tag
  dmi.chassis.type: 10
  dmi.chassis.vendor: LENOVO
  dmi.chassis.version: Lenovo G510
  dmi.modalias: dmi:bvnLENOVO:bvr79CN44WW(V3.03):bd12/07/2013:svnLENOVO:pn20238:pvrLenovoG510:rvnLENOVO:rnINVALID:rvr31900058Std:cvnLENOVO:ct10:cvrLenovoG510:
  dmi.product.name: 20238
  dmi.product.version: Lenovo G510
  dmi.sys.vendor: LENOVO

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